Fix CDM UI regressions

This change addresses two regressions:
UI flashing after selecting a device of the same OEM for pairing,
and occasional failure to display the spinner in the multiple devices dialog.

Flag: EXEMPT bugfix
Test: cts
Bug: 327049496
Change-Id: Iccd74ad5d74be605cf2b88edefa5bc998dfb1461
2 files changed